﻿#region Copyright information
// 
// Copyright © 2005-2013 Yongkee Cho. All rights reserved.
// 
// This code is a part of the Biological Object Library and governed under the terms of the
// GNU Lesser General  Public License (LGPL) version 2.1 which accompanies this distribution.
// For more information on the LGPL, please visit http://bol.codeplex.com/license.
// 
// - Filename: Append.cs
// - Author: Yongkee Cho
// - Email: yongkeecho@gmail.com
// - Date Created: 2012-09-06 11:39 AM
// - Last Modified: 2013-01-25 3:59 PM
// 
#endregion
using System;
using System.Collections.Generic;

namespace BOL.Linq
{
    public static partial class Linq
    {
        public static IEnumerable<TSource> Append<TSource>(this IEnumerable<TSource> source, TSource item)
        {
            foreach (var element in source)
                yield return element;

            yield return item;
        }

        public static IEnumerable<TSource> Append<TSource>(this IEnumerable<TSource> source, IEnumerable<TSource> items)
        {
            if (items == null)
                throw new ArgumentNullException("items");

            foreach (var element in source)
                yield return element;

            foreach (var item in items)
                yield return item;
        }
    }
}
